• Precision Measurement Technologies
  • Technology Center for

729 UltraKera™ TO IS Methane Sensor

Sensor Features

  • New low power design: 42 mA @ 1.18V
  • Innovative chemiresistor technology with possibility of integration into intrinsically safe devices
  • Environmental temperature range of –40 to 60°C with appropriate heater control
  • Thermistor heater allows active control of sensor temperature based on environmental temperature
  • Environmental humidity range of 0 to 95% RH, non-condensing
  • Sensor packaged on low profile TO-46 header

Electrical Characteristics

Property Symbol Value Remarks
Heater Power Consumption PH ~50 mW Continuous at VH = 1.18
Heater Voltage VH 1.18 VDC Tsensor ~ 230°C
Heater Current IH 42 mA Tsensor ~230°C
Heater Resistance RH 15 to 17 Ohms At room temperature
Sensing Voltage VC 2.5 VDC Typical
Typical Resistance in Air Ra 1 MΩ/20 MΩ* Min/Max
Typical Resistance in 1.0% CH4 R1.0 50 kΩ/800 kΩ* Min/Max
Repeatability ±5% Full Scale/±10% Reading Whichever is Greater
Accuracy ± 5% of Full Scale 0-5% CH4